According to the X-Men: Days of Future Past star on Wednesday's Late Night With Seth Meyers, it was Simpson's fault that she partied out of bounds. (Ah, that old chestnut.)

"She was a terrible influence on me," Lawrence told Meyers. "We left, and then she was like, 'Meet me at the bar.' So, I snuck out, and I was like, 'Oh, my god!' I can't do this!' And she was like, 'You can do whatever you want!' And I was like, 'I CAN?' And then, we ran into Brad Pitt and she was like, 'Get Brad Pitt over here!'... So, I just went, 'Hey, Brad Pitt!' and then he came over. He smelled like sandalwood. It was unbelievable."

Things took a turn for the worse when the actress headed to an after-party thrown by Guy Oseary and Madonna. "I puked on his [Oseary's] porch," she confessed. "I was in such bad condition and I look behind me while I'm puking and Miley Cyrus is there, like, 'Get it together.'"

Hey, it happens. Maybe next time make an In-N-Out Burger run first? (E!)